01 -
Preheat oven to 180°C. Generously grease a pie pan with 1 tablespoon of the salted butter.
02 -
Slice rhubarb stalks into thin 0.5cm slices and arrange evenly over the base of the prepared pie pan.
03 -
Melt the remaining 100-105g butter over low heat and allow to cool slightly.
04 -
In a blender, combine eggs, milk, sugar, flour, vanilla extract, nutmeg if using, and the cooled melted butter. Blend for 1 to 2 minutes until completely smooth.
05 -
Pour the batter over the rhubarb, ensuring all pieces are submerged. Bake in the centre of the oven for 45 to 50 minutes, or until the top is golden and evenly puffed.
06 -
Let the custard cool completely in the pan before cutting into 6 to 8 wedges. Serve at room temperature or chilled, optionally accompanied by ice cream or softly whipped cream.